lumen
lumen
Noun
pl: lumens
In physics and lighting, this term describes the perceived power of light. It differs from wattage, which measures energy consumption, by focusing on the actual brightness visible to the human eye.
In anatomy, the term refers to the interior space of a tubular organ. It is a critical concept in medicine and biology when discussing the flow of fluids or the passage of materials through vessels and ducts.
Meanings
Examples
The flashlight provides 500 lumens.